/in/foo.cc: In function 'int main()':
/in/foo.cc:37:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int ii = 1 ; ii < give[i].size(); ii++)
                          ~~~^~~~~~~~~~~~~~~~
/in/foo.cc:43:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0 ; i < na.size() ; i++)
                     ~~^~~~~~~~~~~